Weft detector on loom transferrer arm



Dec. 20, 1927. 1,653,210 l .1. E. HUME WEFT DETECTOR ON LOOM TRANSFERRER ARM Filed Dec.29.' 1925 1 L5 I Imam/0f' 'Y lla/n EMI/m5' Ii@ 5 MMQW@ Patented Dec. 20, 1927.

f UNITED" STATES,

Jorim iiUMnoroLiNToN, MassAoHUsn'rTs issiefivon` rro oR-oivrr'ron a KNowLEs y mori wenns, or wononsfrnnMASSACHUSETTS, A conrona'rron or .ii/nisseciaup wnrr DETECTOR onv noon rRANsriiannn Ami.

Application fledDecember 29, 1925. Serial No. '78;181..` j v This invention` relatesfto weftv detectors for looms and more `particularly to'the'htype of detector mounted on a regularly reciproeating transferrer arm such las setv forthfin Patent No. 15551,:219. f

`Detectors of this type usuallyemploy a transferrer,v arm havinga plunger slidably mounted therein normally locked in nonindicatingr position `and movedL up and down with the .transferrer yarm *without cooperat ing with an indicating'lever pivoted to the replenishing mechanism. There l is 'mounted on the transferrer arm alever'hav ing pivoted at one end thereof a detector of the side vslip type which is movedfintoen` gagement with the surface to befd'etected on each downwardstroke ofthe .transferrer arm. It is found-that the detector is subjectlto undesirable movements resulting'ocf` casionally infalse indicatlons which unlock the plunger so that the latter kgives an improperi'ndication.` It is thegeneral object provide the transferrer arm with a lockingV latch having a surface adjacentfthe `detector to limit movement kof th'elatter in an indicating direction until the yarn of theloobbm has been reduced to a point where indicating movementsof the detector lmay properly occur. l l

It is a further objectoflthe invention to provide a transferrer arm carried detector heldl against indicating movement until ex.-

haustion approaches by a plungerlock unv der which the Idetector moves at exhaustion.

so that continued downward movement of the transferrer serves positively to unlock the plunger.

With these and other objects in viewk which ywill appear as thedescription `proceeds, my inventionresides in the combination and arrangement ofv parts hereinafter dicated in Fig. 1.

described and set forth in vthe claims.`

In the accompanying drawings wherein I have shown a convenientl embodiment of my invention,

Fig. 1 is a vertical section througha loom transferrer arm having my invention applied thereto, the section being taken parallel to the axis of the shuttlev and showing the dealso ,tector in its extreme down positionhandfco-L operating with ar full hobbin,

Fig. 2-is a view similar to Fig. 1 but show-v l Fig. 3 is a"view similar to"Fig.,-2 but ing the Vdetector in engagement with a. bobbin v having a nearly `.depleted ksupply of weft,

'Referring tolthe drawings it will' be kseen f ythatI have provided atransferrerarmy 10 extending parallel Vto andk over `the shuttle and having .pivotally mounted -as at 11.2111

indicatinglever v12 the inneror right hand n fend of which as rviewedV infthe 'drawings is l providedwith a lug lwhich cooperates with la yielding stop Sy of the type set forth in the aforesaid patent.

Thev left or outer end of said lever has pivoted thereto as at 14 i ward movement ofthe detectortip 17. "Said tip, whichfis preferably roughened andprov `portioned tdengage tlie{bohb`in, normally liesltoy one lside of a vertical line passing through'pivot 14. Slidably-mounted on said arm 10 isanindicating kplunger 18 around a.

portion of which lies a compression .springA 19 the function ofjwhich is to move said detectorfromthe position shown in Fig. 1 to the position shown in Fig. 3 at indication of weft exhaustion yso that as the transferrerA .arm is raised movementwill befconveyed to -a lever (not shown). The matter thus far described is substantially the same as that setforth in the aforesaid patent.

In carrying out my invention I provide the .outer end ofgplunger 18 with a notch 30 and pivot kon saidtransferrer arm as at 31y a lock latch 32 having on the upper portion .thereof 'l a detent 33 for'notch 30 and an ex-L tensionli held'against a portion ofthe arm `10 by a leaf spring 35 secured as by' screw 36to the ar1n10. Saidleafispring tends i normally to hold the latch in the position in- The lower end of said latch 32 has a curved face 37 concentric with the center 11 and also has a horizontally extending arm 38 tohe engaged and raised hy thedetector. p N y Under normal operations when sufficient A'yarn for continued weaving is present the tifan'sferrer arm 10 is k'moved downwardly on a detector 15 having an upwardly extending V portion to receive astop screw 16 to cooperatewith a portion of thele'ver and limit out-4 alternate or detecting' beats of the loom so that a transferrer shoe 20 `will closely approximate the butt of the bobbin B. On its descent lug 13 will engage yielding stop S, as contemplated in the aforesaid patent and will serve to move `the detector tip 17 against the bobbiii. So long as' sui'licient'yurn is present- 'to prevent sliding movement of the detector along the bobbin'" the yielding stop will be depressed and the detectorivill be held against lateral movement.

As exhaustion approachesthe parte will be as shown in Fig. 2, `the'detector tip 17 1noving*V to a.` lovver position than indicated in Fig'. ll but still being held against sidewise movement by engagement with the 'face 3T. AsWeavingcontinuesa time will come when there isinsuliicien't yarn to prevent the deftector` from sliding and as the transferr'er descends the tip 17 will move to the right" under arm 38an'd asthe trunsi'ferrer arm continuesdownwardly further descent of the latch32 isprevented by the tip and bobbin thereunder anddatch 32 is'moved to the position slioivn' in Fig. 3 against theaction ot leatl spring y35.` `The eiectI ot' tliislinovement is to. release thelplunger IS-and the same moves to the 4indicating position shown in Fig. 3. Upon tlie'rising movement ot the transferrer arn'rindicatonviil be given as contemplatedin Patent No. 1,3?29316.

`Spring 35` is madesufi'iciently strong to prevent improper movement of the latch 32 should the samebe `struck a-lateraLbl-oivI by detector tip 17` and the detector can inove to theunlockinglpostion as shovvn in F ig.` 3 only: at. suclitiines as they detector` tip lies under thenrin 38.` In this Way the positivedownward motion of thetraiisferrer arm is relied upon to unseat the latch.

Fromthe foregoing itgwillbe seen that I havepr vided a Wett detector for the transferrer wherein the plunger is held locked.y by ay latch Whichis iniailected by ini` proper movement' of the detector tip` I7 and that releasingl ot the plunger by: the latch depends`Y upon the iiiterposition of a portion cations may be' made therein lay those skilled` in theartfWithoutr departing from the spirit and scope oi the invention, andI Vdo not wish toibo limited to the detailsherein disclosedhut lwhat I claim is:

l. In al Weit replenishinglooni having a traiis'ferrer arm regularly reciprocated to- Ward` and from the weft supply to be de tected vand having a plunger slidably mounted therein, a latch to hold the plunger normally in locled position, and a detector supported by the transferrer arm and movable along at'repletc'd' holfbin so that a portion of detector will lie under the latchupon moving at substantial exhaustion before the tra-iisterrer linishes itsniovement toward the supply to be detected, wherebyp continued movement oi the transiierrer arm `toward the Weit supply will move the latch-'to' ai position to unloclithe plungeri 4 In a n'eit ref'ilenishing loom-` liaeving u trunsierrer arm regularly reciprocated to- Wardund 'troiiifthe Weit supply to hel detected and havinga plunger slide-bly mounted therein7 a weft'detector mountedlfor piv-w.

otalniotion with respect to the transferrer" arm, 'alateh mounted onthe-ti-aiis-ferren arhi and norinallylocling thez plunger in noir-l indicating position, and an afrm forme'donw said latch7V said detector moving` at substan-r tial exhaustion so that a portion thereof lies' lunder the arm before the transferrer `fin-.- islies its movement toward the 'supplyto-iltur.L

tletectetl.-Wlieieby continued Amovement 0in.

the transterrer armi lifter saidf portion 0i' the detector liesunder `thearmv` will moveA saidwlatch to unlockingposition.`

3. In a weit replenishing.looinvhaving al transferrer erin regularly.reciprocated to= Ward and trointhe' Weiitsupply :to `bedetectfV ed and havinga. plunger slidably mountedl therein, a levei1 pivotalrly mounted. om the transferrer arm, a detector inem-ber mount^ ed for free'liniited movement on the lever, and a` latch to` lock thec plungeruintnonfindieating position and having a surface Sula1 st antially concentric kwith respect to they anis ofthe `lever and equally eifectivelin` all i po`- sitions' ot the ldetector to restrain excessk movement of thelwlatter, saidA latchv being' moved to unlock the plunger at substantiel exhaustion of ivetti '4. Ina Wett replenishing loom havinglawf transferrer arin regularly reeiprocated` to-` ward and from the Wett supply to be' de l ltected and having a plunger slidab'ly mounts ed therein,- al lever' pivotally mounted on the transferrer arm, a detector mounted for free limited movement on the level", a latch pivotally mounted onl the transferrer arm and havinga portionftovlock the plunger in non-indicating position7 and resilient means" mounted onthe transfert-er arm` to i hold said latch in locking `engagement with the: plunger, said` deteetorhaving a portionito move undenthe latch atl the time et indi-` cation of Weit exhaustion to move the lateh` against the resilient ineaiisand unlock the plunger as Vthe transterrer arm completes its movement toward 'the' Wett supply.

5. In .a'iveft replenishingloom having a lill) transferrer arm regularly reciprocated totransterrer arm, a detector mounted on said lever for `free limited movement, a ylatch having a portion to engage and he stopped by a part of the ti'ansierr'er arm, resilient means to hold said portion against said part, and a hool; formed on the latch normally located in anotch formed on the plunger, said detector moving longitudinally along a substantially denuded bobhin into engagement With a portion of the latch to move the latch to unlocking position.

6. In a Weit detecting mechanism, arcgularly reciprocating transferrer arm having a.

plunger slidaloly mounted therein, a detector su ported bythe transferrer arm and movab e along asuhstantially denuded bob bin at the time of weft exhaustion, and a latch, normallyholding the plunger in nonindicating position said detector at the time of substantial exhaustion of We'ft'moving underand having direct engagement With the latch to move the latter to unlocking ,o

position` at'the time of exhaustion. Y

In testimony whereof I have hereunto affixed my signature.)yk

JOHN E. HUME.

indication kot weft l 

